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Fig. 3 —Cumulative percentage of radiologists who interpret within
each volume category and cumulative percentage of mammograms interpreted by
volume category, stratified by urban and rural locations. Ninety percent of
rural radiologists (point a) versus 70% of urban radiologists
(point b) read < 2,000 mammograms annually. In urban locations,
cutoff of 2,000 mammograms would result in 42% of mammograms (point
c) needing to be redistributed to high-volume radiologists if low-volume
radiologists stopped interpreting mammograms. In rural locations, this cutoff
would mean that majority of mammograms (63%, point d) would have to
be redistributed to high-volume radiologists.